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b/mpd2src/pcmencoder.cpp |
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/* Copyright (C) 2015-2018 J.F.Dockes
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "pcmencoder.h"
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#include "audioutil.h"
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#include "log.h"
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#ifdef DEBUG_ENCODER
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#endif
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using namespace std;
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PcmEncoder::PcmEncoder(AudioReader* audioReader, OhmSenderDriver *ohmSender,
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unsigned packetBytes)
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: AudioEncoder(audioReader, ohmSender, true, "PCM"),
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m_packetBytes(packetBytes)
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{
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LOGDEB("New PCM encoder\n");
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#ifdef DEBUG_ENCODER
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dumpfd = open("/tmp/mpd2dump.pcm", O_WRONLY|O_CREAT|O_TRUNC, 0666);
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#endif
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}
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PcmEncoder::~PcmEncoder()
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{
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LOGDEB("Delete PCM encoder\n");
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#ifdef DEBUG_ENCODER
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if (dumpfd > 0)
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close(dumpfd);
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#endif
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}
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void PcmEncoder::start()
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{
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LOGDEB("Start PCM encoder\n");
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}
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int PcmEncoder::encode(const unsigned char *buffer, unsigned num_bytes, bool halt)
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{
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if (num_bytes > 0) {
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unsigned missing_bytes = m_packetBytes - num_bytes;
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if (missing_bytes > 0) {
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LOGDEB("PcmEncoder::encode: inserting " << missing_bytes << " bytes\n");
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memset((void*)(buffer + num_bytes), 0, missing_bytes);
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}
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if (m_audioReader->needswap())
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swapSamples((unsigned char*)buffer, m_audioReader->bytesPerSample(),
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m_packetBytes / m_audioReader->bytesPerSample());
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}
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m_ohmSender->SendAudio((const TByte*)buffer, (TUint)num_bytes, (TBool)halt);
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#ifdef DEBUG_ENCODER
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if (dumpfd > 0)
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write(dumpfd, buffer, num_bytes);
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#endif
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return num_bytes;
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}
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void PcmEncoder::finish()
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{
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LOGDEB("Finish PCM encoder\n");
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}
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